Home / 100,278.95-138,386.48-54,956.61

Finding the Fourth Proportional to 100,278.95, 138,386.48 and 54,956.61

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Solution

The fourth proportional to 100,278.95, 138,386.48 and 54,956.61 is: 75,840.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278.95 : 138,386.48 = 54,956.61 : x
  2. Step 2: Convert to fraction form
    100,278.95/138,386.48 = 54,956.61/x
  3. Step 3: Cross multiply
    100,278.95x = 138,386.48 × 54,956.61
  4. Step 4: Simplify right side
    100,278.95x = 7,605,251,535.85
  5. Step 5: Solve for x
    x = 7,605,251,535.85/100,278.95
  6. Step 6: Final answer
    x = 75,840.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.